Here are some new PCBs burned in the toaster oven controller I blogged about. There’s still some excess flux that will clean off with isopropyl. First I RTFM’ed for the oven, then re-programmed it for lead-free solder, built the boards, and ran it on autopilot. We still need to check the curve against the datasheet but it’s fairly close. These PCBs will let you run a 5v Arduino on a small LiPo battery. It stacks on the top or bottom of an existing Arduino Mini. It has a battery charger and charge booster to run your microcontroller project on-the-go. This is the first prototype and it needed two hacks to work. The revised design is in-the-works.